The Mayor then smiled: "No. It's a ludicrous trap question. Come on, I think everyone's had enough of this."

It came during this month's edition of Ask Boris - Mr Johnson's monthly LBC show. In answer to the original question from caller Gary over if he would be running for Parliament in 2015 the Mayor said that he's got to get on with running the capital.

"We've got a massive job on our hands, the number one issue for Londoners is housing, what are we doing to tackle that, the Olympic legacy," he replied.

"I've got my hands full. In political terms the number one job of all of us is to work for the re-election of David Cameron because I tell you what, I do not think it would be a good thing for London, I don't think it would be a good thing for this city or this country if we were to go back to Ed Miliband and Ed Balls, who were the guys who totally... I was going to use a profanity... but who drove the car into the ditch last time.

"I don't want to go there. I think David Cameron has done a fantastic job and I want to see him back in 2015."